/*
 * Copyright 2011 JBoss Inc 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jbpm.formbuilder.client.bus;

import com.google.gwt.event.shared.EventHandler;

/**
 * Handler to both define undo/redo actions and register an undo / redo event
 */
public interface UndoableHandler extends EventHandler {

    /**
     * When event happens (to register it on the queue)
     */
    void onEvent(UndoableEvent event);

    /**
     * Action done to Undo this action
     */
    void undoAction(UndoableEvent event);
    
    /**
     * Action done to Do (and Redo) this action
     */
    void doAction(UndoableEvent event);
}
